But of course we have to realise if we are honest 99% are XY and become male or female.
Um... I think you mean that 99% (give or take) are XY or XX and become male or female (respectively). That is mostly true, though we don't have super dependable numbers of how many people are some form of intersex, because chromosomes are rarely tested. That doesn't mean that the remaining percent doesn't exist.
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